Exhaust-muffler.



No. 809,654. PATENTED JAN. 9, 1906. L. T. WEISS,

EXHAUST MUFFLER.

APPLICATION FILED AUG. 18, 1905.

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W m W a m Q LOUIS T. WEISS, OF BROOKLYN, NEIV YORK.

EXHAUST-MUFFLER.

Specification of Letters Patent.

Patented Jan. 9, 1966.

Application filed August 18, 1905. Serial No. 274,742.

To all whom it may concern.-

Be it known that I, LoUIs T. WEISS, a citizen of the United States,residing in the borough of Brooklyn, in the county of Kings, in the cityand State of New York, have invented certain new and useful Improvementsin Exhaustl\/Iufflers, of which the following is a specification.

This invention relates to means for muffling the exhaust of an engine,and as here shown it is especially well adapted for use oninternal-combustion engines.

The object of the invention is to provide an expansion-chamber intowhich the gases from the engine exhaust and means for opening saidchamber to the atmosphere. at predetermined intervals for the escape ofsaid gases.

In the accompanying drawings, which illustrate an embodiment of theinvention, Figure 1 is a longitudinal axial section of the muffler. Fig.2 is a transverse section at x in Fig. 1, showing the ported head of thecylinder. Fig. 3 is a transverse section at a", showing the portedrotary valve in elevation. Fig. 4 is a plan view of the device,illustrating a slightly-different arrangement of the parts.

Referring, primarily, to the first three fig ures of the drawings, 1designates a cylinder in which is a chamber E to receive theexhaust-gases from the engine which enter through a pipe 2. In the wallof the chamber opposite to the.exhaustinlet are ports 3, controlled by arelatively mounted valve 4, having in it ports 5, which may be made tocoincide with the respective ports 3 by rotation of the valve. Thisvalve is mounted on and secured to an arbor 6, rotatively mounted in abearing 7 on the head of the cylinder. Means are provided by which thearbor 6 and the valve 4, carried thereby, may be rotated in a certainfixed relation as to speed with the engine-shaft, and it may have on itfor this purpose a sprocket-wheel 8, whereby it may be driven in a knownway through a chain from the engine-shaft or another shaft driven by theengine. The engine and its shaft or shafts have not been shown, as themanner of driving will be readily understood by any good mechanic.Obviously the retation of the valve 4 will have the effect to open andclose alternately and automatically and at regular intervals the ports 3in the wall of the chamber E, and this is the pur pose of theconstruction, the effect of which will now be explained. The valve 4.will be so set and geared that when the engine exl hausts the ports willbe closed, so as to muffle the sound due to the rapid outflow of theexhaust-gases, and as soon as this has occurred the ports will beopened, so that the gases may escape from said chamber to theatmosphere. Obviously the timing of the opening and closing of the portswill be governed by the time of exhaust by the engine. Where there is agang of engines coupled to cranks in the same shaft, a single mufflermay be employed; but the valve will have to be timed to control thedischarge of the several stood by any one skilled in the art.

Preferably in order to avoid danger from overpressure in the chamber Ethe arbor 6 will be provided at its inner end with a collar 9, andbetween this collar and the bearing 7 will be disposed a strongcompression-spring 10. This spring holds the rotary valve 4 up to itsseat; but if an extra pressure is developed by the gases in the chamberE higher than is safe the spring 10 will yield to compression and allowthe valve to move away from its seat, thus opening the ports 3 fully forthe escape of the gases.

There may be one or more ports in the wall of the chamber and in thevalve, as will be understood by any one skilled in the art, and it isnot essential that the chamber E shall be in a cylinder nor that theinlet for the exhaust shall be opposite to or disposed in any specialrelation to the location of the valve 4. In Fig. 4 the expansion-chamberis in a box 1 of general rectangular form, and the valve 4 is at theside of said box which is adjacent to that where the exhaust enters.This figure also shows a gear-wheel 8 for driving.

Any form of valve or means may be employed so long as the same isconstructed to effect the object set forth.

It has been stated above that the exhaustgases pass into the atmosphereafter escaping from the muffler; but obviously they may when required beled off through an ordinary flue to any distance from the mu flier thatmay be desired. This is a matter within the knowledge of any one skilledin the art. Having thus described my invention, I claim 1. Allexhaustnnuflfler, having an exp ansion chamber which. receives theexhaust from the engine, said chamber having an outsuecessive exhausts,as will be readily under.

let for the exhaust, and automatic means controlling said outlet andopening and closing the latter alternately.

2. An exhaust-muffler, having an expansion-chamber, which receives theexhaust from the engine and which has an outlet for the exhaust, and anautomatic, moving valve Which closes and opens said outlet alternately,said openings and closings corresponding to the times of the exhaust ofthe engine.

3. An exhaust-muffler, having a chamber open to the exhaust, saidchamber having also an outlet for the exhaust, and a rotating, portedvalve controlling the said outlet.

4. An exhaust-muffler, having a chamber open to the exhaust, saidchamber having also an outlet for the exhaust, a moving valvecontrolling said outlet, and a spring which 1 holds said valveyieldingly up to its seat, said spring being so disposed as toyieldingly oppose the pressure of the exhaust-gases.

5. An exhaust-mufl'ler, having an expansion-ehamber open to the exhaust,and said chamber having also an outlet-port 3 for the exhaust, arotating arbor 6, a valve 4 on said arbor and provided with a port 5adapted to be put into coincidence with the port 3 by rotation of thevalve, and spring 10, which holds said valve yieldingly up to its seat.

In Witness whereof I have hereunto signed my name, this 16th day ofAugust, 1905, in the presence of two subscribing witnesses.

LOUIS T. WEISS.

Witnesses H. G. Hosn, TILLIAM J. FIRTH.

